could dump
Regular verb: dump - dumped- dumped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could dump
you could dump
she could dump
we could dump
you could dump
they could dump 	I could be dumping
you could be dumping
she could be dumping
we could be dumping
you could be dumping
they could be dumping	I could have dumped
you could have dumped
she could have dumped
we could have dumped
you could have dumped
they could have dumped	I could have been dumping
you could have been dumping
she could have been dumping
we could have been dumping
you could have been dumping
they could have been dumping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't dump
you couldn't dump
she couldn't dump
we couldn't dump
you couldn't dump
they couldn't dump 	I couldn't be dumping
you couldn't be dumping
she couldn't be dumping
we couldn't be dumping
you couldn't be dumping
they couldn't be dumping	I couldn't have dumped
you couldn't have dumped
she couldn't have dumped
we couldn't have dumped
you couldn't have dumped
they couldn't have dumped	I couldn't have been dumping
you couldn't have been dumping
she couldn't have been dumping
we couldn't have been dumping
you couldn't have been dumping
they couldn't have been dumping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I dump?
could you dump?
could she dump?
could we dump?
could you dump?
could they dump? 	could I be dumping?
could you be dumping?
could she be dumping?
could we be dumping?
could you be dumping?
could they be dumping? 	could I have dumped?
could you have dumped?
could she have dumped?
could we have dumped?
could you have dumped?
could they have dumped? 	could I have been dumping?
could you have been dumping?
could she have been dumping?
could we have been dumping?
could you have been dumping?
could they have been dumping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I dump?
couldn't you dump?
couldn't she dump?
couldn't we dump?
couldn't you dump?
couldn't they dump? 	couldn't I be dumping?
couldn't you be dumping?
couldn't she be dumping?
couldn't we be dumping?
couldn't you be dumping?
couldn't they be dumping? 	couldn't I have dumped?
couldn't you have dumped?
couldn't she have dumped?
couldn't we have dumped?
couldn't you have dumped?
couldn't they have dumped? 	couldn't I have been dumping?
couldn't you have been dumping?
couldn't she have been dumping?
couldn't we have been dumping?
couldn't you have been dumping?
couldn't they have been dumping?